Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, tong cong, thong thong
thanh tra » thanh toan, thanh hoa
dang cong » dung cong
trinh han » trinh quan
tra tuan » tran tuan, tra quan, tri tuan
han cau » hang cau, phan cau, van cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - thanh tra tuan ((thong cong) or (dang cong)) trinh han cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh tra tuan ((thong cong) OR (dang cong)) trinh han cau.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh tra tuan ((thong cong) or (dang cong)) trinh han cau*.